package apiday02.collection;

import java.util.ArrayList;
import java.util.List;

public class ListDemo1 {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("one");
        list.add("two");
        list.add("three");
        list.add("four");
        list.add("five");
        list.add("one");
        System.out.println("list:"+list);

        String s = list.get(3);
        System.out.println(s);//four
        list.set(4,"six");
        System.out.println("list:"+list);

        String s1 = list.set(3,"nine");
        System.out.println(s1);//four

    }
}
